Invoice scanning

We are looking at purchasing a third-party software which will scan invoices and store these images. In Peoplesoft, AP wants to be able to search for scanned images when adding a new voucher or updating an existing voucher. If found, there will be a split screen, one side showing the voucher entry page, the other side, the scanned images for that particular voucher.
Has anyone done this before? Version 8.9 Finance.